feat(docs): add smart accounts icons for light and dark themes

Author: fassko

src/css/custom.css

@@ -344,7 +344,8 @@ div[class^="searchBar_"] div[class*="hitFooter"] a:hover {
 /* Sidebar icons */
 .menu__link[href*="/ftso/overview"]::before,
 .menu__link[href*="/fdc/overview"]::before,
-.menu__link[href*="/fassets/overview"]::before {
+.menu__link[href*="/fassets/overview"]::before,
+.menu__link[href*="/smart-accounts/overview"]::before {
   content: " ";
   display: block;
   flex-shrink: 0;
@@ -386,6 +387,17 @@ div[class^="searchBar_"] div[class*="hitFooter"] a:hover {
   background-image: url("/img/ui/fassets.dark.svg");
 }
 
+.menu__link[href*="/smart-accounts/overview"]::before {
+  width: 26px;
+  height: 26px;
+  background-size: 26px 26px;
+  background-image: url("/img/ui/smart-accounts.light.svg");
+}
+
+[data-theme="dark"] .menu__link[href*="/smart-accounts/overview"]::before {
+  background-image: url("/img/ui/smart-accounts.dark.svg");
+}
+
 /* TOC */
 .table-of-contents__link {
   padding: 4px 12px;